Research on Arc Fault Simulation Device Based on Closed-loop Feedback Control

An efficient arc fault simulation device is beneficial to the research on the mechanism and detection technology of arc faults. In order to simulate the arc fault caused by insulation aging, an arc fault simulation device based on closed-loop feedback control was developed. The device consists of two high-voltage carbonization circuits and a test circuit, which are used for pretreating cable specimens and testing the effects of carbonization respectively. In order to improve the success rate of cable carbonization channels formation, arc voltage, arc current-zero period and arc current rise rate are taken as the basis for arc fault judgment. Finally, the characteristics of carbonized arc are analyzed by using time domain and frequency domain analysis methods. The results show that the developed cable carbonization device can generate continuous burning arc and reduce the interference of human factors in the experiment process, which lays a foundation for further research on the formation mechanism of fault arc.